1、application.properties 配置文件
1 2 3 4 | mail.username=xue@163.com mail.password=xue mail.host=smtp.163.com mail.smtp.auth=true |
2、给普通变量赋值,直接在变量上添加 @Value 注解
1 2 3 4 5 6 7 8 9 10 | import org.springframework.beans.factory.annotation.Value; public class MailConfig { @Value ( "${mail.username}" ) private String username; @Value ( "${mail.password}" ) private String password; @Value ( "${mail.host}" ) private String host; } |
3、给静态变量赋值,直接在静态变量上添加 @Value 注解无效
4、给静态变量赋值
1、使用 set 方法
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Component; @Component public class MailConfig { public static String username; public static String password; public static String host; @Value ( "${mail.username}" ) public void setUsername(String username) { this .username = username; } @Value ( "${mail.password}" ) public void setPassword(String password) { this .password = password; } @Value ( "${mail.host}" ) public void setHost(String host) { this .host = host; } } |
2、使用 @PostConstruct(推荐使用)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Component; import javax.annotation.PostConstruct; @Component public class MailConfig { public static String USERNAME; public static String PASSWORD; public static String HOST; @Value ( "${mail.username}" ) private String username; @Value ( "${mail.password}" ) private String password; @Value ( "${mail.host}" ) private String host; @PostConstruct public void init() { USERNAME = username; PASSWORD = password; HOST = host; } } |
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